Vasa Previa Flashcards
1
Q
If vasa previa suspected based on anatomy ultrasound, what is the next best test?
A
transvaginal ultrasound of cervical os with colour doppler on, MRI if not clear
2
Q
What is the management of an antenatally diagnosed vasa previa?
A
Celestone 28-32 weeks
Hospitalization 30-32 weeks
Consider C/S delivery 35-36 weeks (before labour onset)
3
Q
What one ultrasound finding would make you suspicious for a vasa previa?
A
Velamentous cord insertion
4
Q
Name risk factors for vasa previa.
A
velametous cord insertion marginal cord insertion succenturiate lobe T2 placenta previa (OR 22) multiples fetal anomalies antepartum hemorrhage fetal IUGR
5
Q
How much blood does a fetus need to bleed to cause shock/death?
A
100cc
6
Q
What is the blood test which looks for the presence of fetal hemoglobin in maternal circulation?
A
Alkali denaturation test aka Apt test
Kleihaur-Betke is a DNA test which is faster
